Rich I was the ADMIN guy for a 50k member archery web forum for five years. It was powered by vBulletin (Jelsoft). I learned alot about the spammers and found some creative ways to shut them down. Too bad you cannot migrate to that platform. It is a true forum with tons of cool tools and not a modified blog like this one.
I don’t know as much about Drupal but those spam plugins look interesting. I tested the filters with some obvious spam and it blocked me. Seems to be working. Good luck
